Now
we tell the target that we want to allow connections to the device
iqn.2014-05.com.example:storage.lun1 from the IP address
172.31.132.55 (server1.example.com) and 172.31.132.59
(server2.example.com)...

The
settings for the storage device iqn.2014-05.com.example:storage.lun1
on 192.168.0.102:3260,1 are stored in the file
/etc/iscsi/nodes/iqn.2001-04.com.example:storage.lun1/172.31.132.60
,3260,1/default. We need to set the username and password for the
target in that file; instead of editing that file manually, we can
use the iscsiadm command to do this for us: